Hi,
We are using STi7109 from ST Microelectronics with the STAPI M6 DirectFB driver.
According to their documentation, the 2d blitter should be able to blit at
200MPixels/sec. We enable hardware acceleration and have some performance issue.
We have a small test program that shows the time taken by several functions and
it appears that Blit is particularly slow, taking a bit more than 3 seconds for
a 2MPixels image (1920*1080), which is roughly 300 times slower than expected.
We also tried with hardware acceleration disabled and it takes nearly half the
time it takes with acceleration enabled (alright, it is faster without
hardware acceleration than with it).
Enclosed are the source code for our tests and the output with results, with and
without acceleration.
As you can see, the other functions do not seem as slow as Blit.
Could you please enlighten us on this matter?
Greetings
--
Alexandre Franke
// sh4-linux-gcc -I /opt/STM/STLinux-2.2/devkit/sh4/target/usr/include/directfb/ -L /opt/STM/STLinux-2.2/devkit/sh4/target/usr/lib/ -l directfb -o benchmark dfb_benchmark.c
#include <directfb.h>
#include <stdio.h>
#include <time.h>
#define TIME( x... ) \
{ \
struct timeval before, after; \
gettimeofday(&before, NULL); \
x; \
gettimeofday(&after, NULL); \
printf("\n%s\nBefore operation:%ld.%ld\t\tAfter operation:%ld.%ld\n", #x, before.tv_sec, before.tv_usec, after.tv_sec, after.tv_usec); \
}
int main(int argc, char **argv)
{
system("insmod /home/modules/modules26/stapi/stgfb_core.ko mod_init=\"YES\" layer_name=\"LAYER_GDP1\" g_tvOutMode=\"1920x1080-50i\"");
IDirectFB *dfb = NULL;
IDirectFBSurface *primary = NULL, *background = NULL;
DFBSurfaceDescription primary_desc, background_desc;
DirectFBInit(0, NULL);
DirectFBCreate(&dfb);
dfb->SetCooperativeLevel(dfb, DFSCL_FULLSCREEN);
primary_desc.flags = DSDESC_CAPS;
primary_desc.caps = DSCAPS_PRIMARY|DSCAPS_FLIPPING;
dfb->CreateSurface(dfb, &primary_desc, &primary);
TIME( primary->Clear(primary, 0, 0, 0, 0) );
background_desc.flags = DSDESC_CAPS;
background_desc.caps = DSCAPS_PRIMARY | DSCAPS_FLIPPING;
IDirectFBImageProvider *background_provider;
dfb->CreateImageProvider(dfb, "pics/background.png", &background_provider);
background_provider->GetSurfaceDescription(background_provider, &background_desc);
primary->SetBlittingFlags(primary, DSBLIT_BLEND_ALPHACHANNEL);
TIME( dfb->CreateSurface(dfb, &background_desc, &background) );
TIME( background_provider->RenderTo(background_provider, background, NULL) );
background_provider->Release(background_provider);
TIME( primary->Blit( primary, background, NULL, 0, 0 ) );
primary->SetColor(primary, 0x80, 0x80, 0xFF, 0xFF);
TIME( primary->FillRectangle( primary, 100, 100, 500, 400 ) );
TIME( primary->Flip(primary, NULL, DSFLIP_WAITFORSYNC) );
background->Release(background);
primary->Release(primary);
dfb->Release(dfb);
system("rmmod stgfb_core");
}
=======================| DirectFB 1.0.0-rc1 |=======================
(c) 2001-2006 United Cultures of Earth - go for outer space!
(c) 2000-2004 Convergence (integrated media) GmbH
----------------------------------------------------------------
(*) DirectFB/Core: Single Application Core. (2006-10-15 11:13)
(*) Direct/Thread: Running 'VT Switcher' (CRITICAL, 1596)...
(!) DirectFB/FBDev: Could not retrieve palette for backup!
--> Invalid argument
(*) Direct/Modules: suppress module 'lirc'
(*) Direct/Modules: suppress module 'ps2mouse'
(*) Direct/Thread: Running 'Keyboard Input' (INPUT, 1606)...
(*) DirectFB/Input: Keyboard 0.9 (convergence integrated media GmbH)
(!) DirectFB/gfxdrivers/stgfx: FB file descriptor = 3
(*) DirectFB/Graphics: ST Microelectronics Gamma 0.1 (ST Microelectronics)
(*) DirectFB/Core/WM: Default 0.2 (Convergence GmbH)
(!) DirectFB/DirectFBCreate: Setting desktop resolution to 1920x1080 failed!
-> Using default resolution.
(!) DirectFB/DirectFBCreate: Setting desktop format failed!
-> Using default format.
(!) DirectFB/DirectFBCreate: Setting desktop buffer mode failed!
-> No virtual resolution support or not enough memory?
Falling back to system back buffer.
primary->Clear(primary, 0, 0, 0, 0)
Before operation:1143198703.404345 After
operation:1143198703.453027
(*) Direct/Interface: Loaded 'PNG' implementation of 'IDirectFBImageProvider'.
dfb->CreateSurface(dfb, &background_desc, &background)
Before operation:1143198703.528842 After
operation:1143198703.529028
background_provider->RenderTo(background_provider, background, NULL)
Before operation:1143198703.531661 After
operation:1143198705.504325
primary->Blit( primary, background, NULL, 0, 0 )
Before operation:1143198705.526134 After
operation:1143198707.355721
primary->FillRectangle( primary, 100, 100, 500, 400 )
Before operation:1143198707.358799 After
operation:1143198707.363731
primary->Flip(primary, NULL, DSFLIP_WAITFORSYNC)
Before operation:1143198707.366773 After
operation:1143198707.423761
=======================| DirectFB 1.0.0-rc1 |=======================
(c) 2001-2006 United Cultures of Earth - go for outer space!
(c) 2000-2004 Convergence (integrated media) GmbH
----------------------------------------------------------------
(*) DirectFB/Core: Single Application Core. (2006-10-15 11:13)
(*) Direct/Thread: Running 'VT Switcher' (CRITICAL, 1601)...
(!) DirectFB/FBDev: Could not retrieve palette for backup!
--> Invalid argument
(*) Direct/Modules: suppress module 'lirc'
(*) Direct/Modules: suppress module 'ps2mouse'
(*) Direct/Thread: Running 'Keyboard Input' (INPUT, 1602)...
(*) DirectFB/Input: Keyboard 0.9 (convergence integrated media GmbH)
(!) DirectFB/gfxdrivers/stgfx: FB file descriptor = 3
(*) DirectFB/Graphics: ST Microelectronics Gamma 0.1 (ST Microelectronics)
(*) DirectFB/Graphics: Acceleration disabled (by 'no-hardware')
(*) DirectFB/Core/WM: Default 0.2 (Convergence GmbH)
primary->Clear(primary, 0, 0, 0, 0)
Before operation:1143198799.916382 After
operation:1143198799.965183
(*) Direct/Interface: Loaded 'PNG' implementation of 'IDirectFBImageProvider'.
dfb->CreateSurface(dfb, &background_desc, &background)
Before operation:1143198800.41270 After operation:1143198800.41457
background_provider->RenderTo(background_provider, background, NULL)
Before operation:1143198800.44520 After operation:1143198802.18153
primary->Blit( primary, background, NULL, 0, 0 )
Before operation:1143198802.39980 After
operation:1143198803.873042
primary->FillRectangle( primary, 100, 100, 500, 400 )
Before operation:1143198803.876059 After
operation:1143198803.880931
primary->Flip(primary, NULL, DSFLIP_WAITFORSYNC)
Before operation:1143198803.883961 After
operation:1143198803.941028
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